\part{part}
	part text
	part text
\chapter{chapter long title}
 chapter text
 chapter text
 \[
	 f(x)=x^2
 \]
\section[for the toc]{section}
 section text
 section text
\section[for the toc]{section}
 section text
 section text
\subsection[for the toc]{subsection}
	subsection text
	subsection text
\subsection[for the toc]{subsection}
	subsection text
	subsection text
	\section[for the toc]{section}
	 section text
	 section text
	 \chapter{chapter}
	  chapter text
	  chapter text
	  \part{part}
		  part text
		  part text
	 \chapter[toc]{chapter title}
	  chapter text
	  chapter text
	\section[for the toc]{section}
	 section text
	 section text
\subsubsection[for the toc]{subsubsection}
	subsubsection text
	subsubsection text
\paragraph{paragraph}
	paragraph text
	paragraph text
\subparagraph{subparagraph}
	subparagraph text
	subparagraph text
	\section[for the toc]{section}
	 section text
	 section text
	\subsubsection[for the toc]{subsubsection}
		subsubsection text
		subsubsection text
	\paragraph{paragraph}
		paragraph text
		paragraph text
\subparagraph{subparagraph}
	subparagraph text
	subparagraph text
	\chapter[somethingelse]{goes here}
